Hello, I just acquired a working amplifier made by AB Systems. It is a ATD Series 221. Does anyone have or knows where to locate a manual and specs for this unit? Thank you in advance for any assistance.
AB Systems series 221
- Thread starter Dean Richard
- Start date
Is it AB International? Your best bet might be the Wayback Machine to see if it crawled the old AB website. AB hasn't been around for maybe 15+ years, so finding documentation may be a bit of a needle in a haystack.
I had an AB Systems amp (AB Systems is the predecessor to AB International) many many years ago, and it was ancient even then. Cool that it still works! I think what you are talking about is minimum around 30 years old (probably closer to 40) so it is unlikely that there would be much on the internet for it.